Hi Alexander,
Looking at that Makefile:
# Use make M=dir to specify directory of external module to build
# Old syntax make ... SUBDIRS=$PWD is still supported
# Setting the environment variable KBUILD_EXTMOD take precedence
ifdef SUBDIRS
KBUILD_EXTMOD ?= $(SUBDIRS)
endif
ifeq ("$(origin M)", "command line")
KBUILD_EXTMOD := $(M)
endif
So specifying KBUILD_EXTMOD or M is the same thing, which tells KBUILD the directory that the Makefile for the module is in.
And by default, KBUILD will build the module in KBUILD_EXTMOD.
What I want is tell KBUILD to build the modules in a specified directory.
Regards.
On Jan 2, 2017, 20:30 +0800, Alexander Kapshuk <alexander.kapshuk@gmail.com>, wrote:
On Mon, Jan 2, 2017 at 1:39 PM, Shiyao Ma <i@introo.me> wrote:
Hi,
When building an external module, for example, given this command,
all:
$(MAKE) -C $(KDIR) M=$$PWD
It will build the ko file in the $PWD.
How to specify a location for the .ko files?
Regards.
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Perhaps KBUILD_EXTMOD is what you're looking for.
/path/to/kernel/sources/Makefile:183,185
# Use make M=dir to specify directory of external module to build
# Old syntax make ... SUBDIRS=$PWD is still supported
# Setting the environment variable KBUILD_EXTMOD take precedence